Cleanup: Remove for_search param from search::InstantExtendedEnabledParam()

ios/chrome/browser/search_engines/ui_thread_search_terms_data.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ios/chrome/browser/search_engines/ui_thread_search_terms_data.h"
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "components/google/core/browser/google_url_tracker.h"
 #include "components/google/core/browser/google_util.h"
@@ skipping 73 matching lines @@
 std::string UIThreadSearchTermsData::GetSuggestClient() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return search::IsInstantExtendedAPIEnabled() ? "chrome-omni" : "chrome";
 }
 
 std::string UIThreadSearchTermsData::GetSuggestRequestIdentifier() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return "chrome-ext-ansg";
 }
 
-std::string UIThreadSearchTermsData::InstantExtendedEnabledParam(
-    bool for_search) const {
+std::string UIThreadSearchTermsData::InstantExtendedEnabledParam() const {
   DCHECK(thread_checker_.CalledOnValidThread());
-  return search::InstantExtendedEnabledParam(for_search);
+  return search::InstantExtendedEnabledParam();
 }
 
 std::string UIThreadSearchTermsData::ForceInstantResultsParam(
     bool for_prerender) const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return search::ForceInstantResultsParam(for_prerender);
 }
 
 std::string UIThreadSearchTermsData::GoogleImageSearchSource() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   std::string version(version_info::GetProductName() + " " +
                       version_info::GetVersionNumber());
   if (version_info::IsOfficialBuild())
     version += " (Official)";
   version += " " + version_info::GetOSType();
   std::string modifier(GetChannelString());
   if (!modifier.empty())
     version += " " + modifier;
   return version;
 }
 
 }  // namespace ios